Mechanism for verifying pattern cards



F. C. WIESINGER MECHANISM FOR VERIFYING PATTERN CARDS 6 Sheets-Sheet lINVENTOR. FREDERICK C WIESINGER B fimaflwzame A TTORNE Y May 31, 1966Filed April 15, 1963 y 1966 F. c. WIESINGER 3,253,462

MECHANISM FOR VERIFYING PATTERN CARDS Filed April 15, 1963 eSheets-Sheet 2 INVENTOR. FREDERICK C.WIESINGEIZ.

22M 09km A TTORNE Y May 31, 1966 F. c. WIESINGER 3,253,462

MECHANISM FOR VERIFYING PATTERN CARDS Filed April 15, 1965 6Sheets-Sheet 5 INVENTOR. FREDERICK C. WI ESINGER.

A TTORNEY y 1966 F. c. WIESINGER 3,253,462

MECHANISM FOR VERIFYING PATTERN CARDS Filed April 15, 1963 6Sheets-Sheet 4 INVENTOR. FREDERICK cwlssmeza.

A TTORNEY y 1966 F. c. WIESINGER 3,253,462

MECHANISM FOR VERIFYING PATTERN CARDS Filed April 15, 1963 6Sheets-Sheet 5 INVENTOR.

FREDERICK C WIESINGER.

A TTORNE Y 2 Q-ALM y 1966 F. c. WIESINGER 3,253,462

MECHANISM FOR VERIFYING PATTERN CARDS Filed April 15, 1965 6Sheets-Sheet 6 INVENTOR. FREDERICK C WIESINGER.

am QQMM A TTORNE Y United States Patent 3,253,462 MECHANISM FORVERIFYING PATTERN CARI )S Frederick C. Wiesinger, Feasterville, Pa.,assignor t0 W1ldman Jacquard C0., Norristown, Pa., a corporation ofPennsylvania Filed Apr. 15, 1963, Ser. No. 273,076 Claims. (Cl. 73-156)This invention relates to the art of knitting and, more particularly, tothe programming cards utilized in circular jacquard knitting machines.

It is a general object of the invention to provide a verifying means forchecking pattern cards.

It is a further object of the invention to provide a mechanical means ofvarifying a pattern card by checking it against a master pattern card.

It is a further object of the invention to provide a pattern cardverifying mechanism that can be adapted to function in conjunction witha pattern card duplicating machine.

It is a still further object of the invention to provide a pattern cardverifying mechanism which will automatically cease to function should avariation from the master pattern card be detected.

Other objects and advantages of the invention will )become apparent fromthe following more detailed disclosure.

Pattern cards of the type utilized in circular jacquard knittingmachines are produced in a pattern card duplicating machine well knownto those conversant in the art such as the duplicating machinesmanufactured and sold by the Wildman Jacquard Co., of Norristown,Pennsylvania.

These machines utilize a master pattern card which, by means o f'aplurality of sensing levers being in contact therewith, influences the=levers in such a manner so as to transmit its dictates to the punchingapparatus to form identical perforations on a new card being formed asthose on said master card.

The means of verifying or checking these pattern cards prior to theinstant invention has been by visual, comparison with a master card.This procedure has been slow and tedious and in view of the humanelement involved has not always been completely effective.

According to the instant invention, a mechanical means can noW beemployed to verify a pattern card to determine if the patternperforations formed thereon are the same as those on the master patterncard.

These pattern cards are formed on a duplicating machine from sheet-likematerial and since a plurality of like cards are used on a singleknitting machine, the re quired number are formed on a single strip ofthis material with the necessary spacing between each group of patternperforations to permit said strip to be divided into individual patterncards.

The verifying mechanism according to the invention is adapted tofunction in conjunction with the duplicating machine. It includes afirst and second drum member, the first of which supports and guides asecond master pattern card and the second drum member is adapted tosupport and guide the newly formed perforated strip comprising thenumber of duplicated pattern cards required.

A plurality of dual sensing levers are disposed above the drum membersand said levers are caused to recipro cate vertically. The drum membersare caused to move in increments equivalent to the spacing of theparallel rows of pattern perforations on the cards, moving the cardstherewith and in timed relation with the reciprocation of the sensinglevers. The master pattern card and the strip of perforated cards beingcompared therewith are caused to move syohronously over the drummembers. If a variation is detected in the cards being compared by oneor more of the sensing levers, the complete operation will bediscontinued by means of an electrically controlled stop motion adaptedfor that purpose. Verifying pattern cards in this manner and stoppingthe machine in the event of a variation in the cards prevent anexcessive number of incorrect pattern cards from being formed as well aseliminating the time and waste of material that could be had and thathave been experienced prior to the instant invention.

The invention will be described in greater detail hereinafter byreference to the accompanying figures of drawing, wherein:

FIG. 1 is a perspective view showing a portion of a duplicating machineand the verifying mechanism according to the invention applied thereto;

FIG. l-A is a perspective view of the comb-like member utilized topostion and guide the upper portion of the sensing levers;

FIG. 2 is a view in front elevation of the verifying mechanism minus itscover plates, and showing the various components thereof for turning thedrum members (not shown), means for reciprocating and manually raisingthe sensing levers, and in order to show clearly the lower portion ofsaid sensing levers, the idler tension .roller has been illustratedelevated above that position to which it can be raised.

FIG. 3 is a view in side elevation as seen looking from the right-handside of the verifier showing the sensing levers, their means of verticalreciprocation, the pattern cards and the direction they are caused tomove over the drum members which are incrementally rotated by rosettewheels attached thereto.

FIG. 4 is a sectional view of a portion of the verifier as seen lookingin the direction of the indicating arrows 4-4 in FIG. 3, showing themeans for incrementally turning the drum members;

FIG. 5 is a view in side elevation as seen looking from the left-handside of the verifier showing the drive means utilized to obtain thedesired motions to reciprocate the sensing levers and rotate the drummembers;

FIG. -6 is a view similar to that of FIG. 5 but partially in sectionhaving the side portion thereof cut away to show the gearing required totransmit the required motion to the sensing levers and drum members;

FIG. 7 is a view in side elevation and partialy in section showing therelationship of the sensing levers with the drum members :and patterncards being compared; also the sensing lever is shown at its highestpoint during vertical reciprocation;

FIG, 8 is a view similar to that of FIG. 7 but showing the sensing leverat its lowermost position and with the sensing portions thereofextending through the perfora tions in the pattern cards and into thelongitudinal grooves provided on the outer periphery of the drummembers; FIG. 9 is a view similar to both FIGS. 7 and 8 but showing thetilted position the sensing lever is caused to assume should it detect avariation in the pattern cards being compared;

FIG. 10 is a wiring diagram of the electrical circuit utilized duringthe actual running of the duplicating machine in combination with theverifying mechanism according to the invention; and

FIG. 11 is a wiring diagram of the electrical circuit which acts to stopthe entire operation of punching and verifying should a variation in thepattern cards being compared be detected.

Now referring to FIG. 1, a pattern card duplicating machine to which theinvention may be applied comprises a punching head 20, a plurality ofpattern indicating levers 21 which are caused to transmit the dictatesof a first master pattern card 22 to said punching head. The master cardis supported and guided by a pattern drum 23 which is caused to rotatein a clockwise direction and in increments equivalent to the spacing ofhorizontal parallel rows of pattern perforations on the master patterncard.

The master pattern card 22 being of the endless type is provided with aweighted roll 24 to maintain said card in general vertical alignmentwith pattern drum 23. This drum is provided with longitudinallyextending grooves (not shown) disposed about the entire outer peripheryof the drum and spaced to align with the perforations in the masterpattern card. The pattern indicating levers 21 are continually urged tothe forward or left-hand side position depicted in FIG. 1, as well asdownwardly, by individual coil springs 25 attached to the levers as at26 and to the machine itself as at 27. Each indicating lever 21 isprovided on its underside and adjacent the forward end thereof withspring biased pin members 28 (one only shown in FIG. 1). These pinmembers are caused to bear against the master pattern card and as thiscard is advanced by drum 23, the pin members 28 which become alignedwith the pattern perforations will pass through them and thence into thelongitudinal extending groove in the drum. As drum 23 continues to move,it will push each indicating lever 21 whose pin 28 is in register oralignment with a pattern perforation in that particular row inwardlytoward the punching head 20. In this manner, the dictates of the masterpattern card are transmitted to the punching head causing identicalperforations to be formed on pattern card material 29 being fed into andthrough said punch ing head, all in a known manner.

This pattern card material is drawn from a supply spool 30 suitablypositioned beneath the machine itself.

The machine receives its means of motion through a driven shaft 31 whichis caused to be rotated by any suitable form of power. Shaft 31 extendstransversely of and beyond the opposite side of the machine and providesa source of power at this point that is utilized to initiate movement ofthe various components of the verifying mechanism according to theinvention to be detailed hereinafter.

Shaft 31 is also provided with a clutch member 32 which can be engagedor disengaged by a lever member 33 which is pivotally attached to themachine intermediate its ends as at 34. The inner end of lever 33 isengageable with the clutch as at 35 and its opposite end is pivotallyattached as at 36 to the actuating arm 37 of an electrically controlledsolenoid 38. This solenoid member is interconnected with the means formanually starting and stopping the machine as well as the automatic stopmotion forming a part of the invention to stop the entire operationshould a variation be detected in the pattern cards being compared.

The pattern card duplicating mechanism is mounted and supported on atable-like structure 39 and the verifying mechanism according to theinvention, which is generally indicated by numeral 40, is attached tosaid structure rearwardly of the card duplicating mechanism and in aposition where it is adapted to receive the strip of pattern cardmaterial 29, having perforations thereon, as it comes from the punchinghead 20.

The mechanism according to the invention includes a first casing 41 andis supported by a rearwardly directed extension 42 which as seen lookingfrom the front of the machine is attached to the left rear supportingmember of structure 39. This casing is attached to extension 42 by meansof cap screws 43 (FIG. 6).

A second casing 44 situated in general alignment with the pattern cardstrip being formed assembles against the inner side of and intermediatethe ends of the first casing 41 by means of cap screws 45 and 46 (FIGS.2, 5, and 6).

Casing 41 houses the proper gearing necessary to effect movement of thevarious components which make up the invention and includes a sprocket47 on the outside of and in close proximity with the outer wall of saidcasing 41 (FIG. 5) and is interconnected by a chain 48 to a similarsprocket (not shown) assembled on that end of driven shaft 31 oppositethe clutch member 32.

An idler sprocket 49 disposed below and slightly rearward of sprocket 47is also in mesh with chain 48. This idler sprocket is freely rotatableon a stud member 50 and assembles in a vertical slot 51 provided in theouter side wall of casing 41. Slot 51 permits vertical adjustment ofstud 50 and the idler sprocket 49 and serves as a means for adjustingthe tension under which the chain 48 is caused to travel.

Sprocket 47 assembles on the outer end of a driving shaft 52 which isjournaled in the outer and inner walls of casing 41 and extends beyondthe inner wall for a purpose to be described hereinafter.

Within the confines of casing 41 there is provided a first gear member53 fixedly positioned on shaft 52 and in close proximity with the innerwall of casing 41. Gear member 53 is in meshing relation with an idlergear 54 that is freely rotatable on a shaft 55 which is in horizontalalignment with shaft 52 and which is also journaled in both the outerand inner walls of casing 41. A third shaft 56 is also in horizontalalignment with shafts 52 and 55 and is journaled in a like manner incasing 41. The inner end of shaft 56 extends through and beyond theinner wall of casing 41 and serves a purpose like that of shaft 52 whichwill be described hereinafter in greater detail. Shaft 56 is providedwith a second gear member 57 (FIG. 6) fixedly attached thereto and inmeshing relation wtih the idler gear 54. To prevent longitudinalmovement of shafts 52, 55, and 56 they are provided with collars 58adjacent their respective gear members and adjacent their journal pointsin the outer wall of casing 41.

A third gear member 59 (FIG. 6) in meshing relation with the idler gear54 is disposed beneath and in general alignment with said idler gear.This third gear is fixedly positioned adjacent the end of a cam shaft 60within the confines of casing 41 and said cam shaft being rotatable isjournaled in the inner side walls of casings 41 and 44 and that end ofsaid cam shaft opposite said third gear member is journaled in the lowercentral portion of the outer wall of casing 44 (FIG. 2).

The first gear member 53 being a driven gear is caused to rotate in thedirection of the indicating arrow shown in FIG. 6. This gear being inmeshing relation with the idler gear 54 transmits its motion throughsaid idler gear to the second and third gear members which are in meshtherewith causing them to rotate in the direction of the indicatingarrows depicted in FIG. 6. Above and in general alignment with shafts 52and 56 casing 41 is provided with a pair of drum shafts 61 and 62 whichare supported in aligned apertures provided in the side walls of casing41 and are fixedly positioned therein by means of set screws 63 providedin the inner wall of said casing (one only shown in FIG. 4). These drumshafts extend outwardly from casing 41 and on each side of casing 44 fora distance substantially that which the latter casing extends fromcasing 41.

The inner side wall of casing 41 is provided with a pair of generallycircular milled pockets 64 and 65. The drum shaft 61 and 62 extendoutwardly from the center of these pockets and support therein a pair ofconventional Geneva Wheels or rosettes 66 and 67, respectively.

A pair of cylindrical drum members 68 and 69 are rotatably received onthe drum shafts 61 and 62 and are fixedly attached to the rosettes 66and 67, respectively. The drum members are provided with sprocket teeth70 and 71 at their ends (FIGS. 1, 3, and 4) which are adapted to enterthe sprocket holes 72 and 73 adjacent the edges of the pattern cards forthe purpose of advancing the same as said drum members are caused torotate.

- Those portions of shafts 52 and 56 which extend through and beyond theinner side wall of casing 41 are provided on each end thereof withconventional rosette drive cams 74 and 75, respectively. These drivecams vare fixedly attached to their respective shafts and being in theform of discs, they are provided on the inner faces thereof with pinmembers 76 and 77 which extend in the direction of casing 41. Pockets 64and 65 are provided with lower extended pockets 78' and 79',respectively, and provide clearance for the pin members 76 and 77 asthey rotate with the rosette drive cams on shafts 52 and 56. With eachrevolution of these shafts, pins 76 and 77 are caused to engage a slotin the rosettes to advance the drum members 68 and 69 in incrementsequivalent to the parallel rows of pattern erforations on the patterncard material 29 in strip form containing the newly formed patternperforations. The member 29 is caused to pass over drum 68 and thesecond master pattern card 78 is caused to pass over drum 69. Drummembers 68 and 69 are provided on the outer periphery thereof withequally spaced longitudinal grooves 79 and 80 (FIGS. 3, 7, 8, and 9)which align with and underlie the pattern perforations in the cards asthe latter are caused to pass thereover. The drum members are causedsimultaneously to advance in increments in the direction of theindicating arrows depicted in FIG. 3 and the pattern perforations on thesecond master pattern card 78 are synchronized with those perforationson strip 29 so that the plurality of dual sensing members which will befully described hereinafter will be comparing corresponding or likeperforations during their vertical reciprocation.

The second master pattern card 78- utilizes a second weighted roll 81 tomaintain said card in general vertical alignment with drum 69.

The pattern card strip 29 is caused to pass beneath an idler roller 82(FIGS. 1 and 2) prior to passing over drum 68 and maintains said stripunder a slight amount of tension while moving from the punching head tosaid drum. This roller spans'the width of the pattern card strip 29 andis rotatably received onto an idler spindle 83. The spindle is attachedto an arm 84 which extends in a generally rearward direction and at aright angle thereto. Arm 84 at its opposite end is fixedly attached to acylindrical sleeve 85 which assembles on the drum shaft 61 within casing41 and being oscillatable thereon, it provides a means for manuallylifting the idler roller 82 out of contact with the pattern card strip29.

That portion of cam shaft 60 within the confines of casing 44 isprovided with a pair of cam members 86 and 87 (FIGS. 2 and 3) which arefixedly attached to said shaft and are caused to rotate therewith. Apair of collar members 88 and 89 are assembled on this shaft in abuttingrelation with the cams to prevent the possibility of said cams frommoving inwardly away from their operating position.

The lower end of a pair of push rods 90 and 91 are in contact with earns86 and 87, respectively. The push rods extend in a vertical directionthrough aligned apertures in a supporting cross member 92 which attachesto and extends between the side walls of casing 44. Push rod 90 extendsthrough a guide member 93 and push rod 91 extends through a guide member94 both of which are attached to the cross member 92 by means of capscrews 95 and 96, respectively (FIG. 2).

The upper portion of the push rods being threaded are adapted toassemble into the bottom of a lifting lever yoke 97. Push rod 91 isprovided at its upper extremity with an elongated threaded surface 98and locking nut 99 Which serves as a leveling adjustment for the liftinglever yoke 97.

Rotation of cams 86 and 87 causes the push rods to follow the contour ofsaid cams to vertically reciprocate the lifting lever yoke 97. Tomaintain said push rods in contact with the cams, a coil spring 100 isprovided intermediate said lever yoke and the cross member 92. This coilspring is provided on each end thereof with threaded pin members 101 and102, one of which assembles in the cross member 92 and the other ingeneral alignment therewith in the bottom of the lifting lever yoke 97.

The lifting lever yoke 97 i provided with a pair of spaced parallel rodmembers 103 and 104 which extend the length of said lever yoke. Theserod members are adapted to support a plurality of vertically disposeddual sensing levers generally indicated by numeral 105 and equivalent innumber to the maximum number of pattern perforations which can be madein a single row extending the width of a pattern card.

The sensing levers are shaped generally in the form of an invertedletter T and have upwardly directed spaced slots 106 and 107 on thelower sides thereof which align with and are adapted to receive the rodmembers 103 and 104 therein (FIGS. 7, 8, and 9). The stem portions 108of the sensing levers extend upwardly in a vertical direction with theterminal portions thereof being bifurcated as at 109. Each sensingmember is spring biased in a downwardly direction by a pair of coilsprings 110 and 111. These springs are attached at one end to rearwardlyand forwardly directed ear 112 and 113 which extend from and form anintegral part of the stern portions 108 of the sensing levers. Theopposite ends of these springs are attached to individual nibs providedon spring hook plates 114 and 115 which are assembled by means of capscrews 116 and 117 and clamping plates 118 and 119, respectively, to barmembers 120 and 121 disposed below ears 112 and 113 and which extendbetween the side walls of casing 44.

Due to the thickness of the sensing levers 105 and the plurality whichare required for a pattern card, alternate sensing levers are providedwith ear 122 and 123 (FIG. 3) which are like and serve the same purposeas ears 112 and 113 on the intermediate levers, but are positioned loweron the stem 108 to provide adequate side clearance for the plurality ofcoil springs 110 and 111 required. Like springs are attached to the earsof alternate sensing levers with the opposite ends of said springs beingattached to the nibs of similar spring hook plates assembled in a likemanner below and in vertical alignment with the lower anchoring means ofthe upper springs. The lower spring hook plates differ somewhat from theupper plates 118 and 119 and are depicted by numerals 124 and 125 inFIG. 3. These spring hook plates extend forwardly and rearwardly fromtheir anchor points and, their outer surfaces being directed downwardly,are

adapted to support lower sensing lever guides 126 and 127, respectively.These lever guides are provided with a plurality of vertically disposedslots which are adapted to receive and guide the lower forwardly andrearwardly extending arms 128 and 129 which form the lower portion ofeach sensing lever 105 (FIGS. 7, 8, and 9).

An upper sensing lever comb or guide 130 having a cross-sectionalconfiguration that is generally L-shaped is attached to,the forwardupper portion of casing 44 by means of cap screws 131 and extendsdownwardly and thence inwardly to guide the upper bifurcated portion ofthe sensing levers in a plurality of horizontally extending slots 130'provided for that purpose.

The outer and lower ends of the forwardly and rearwardly extending arms128 and 129 which form an integral part of each sensing lever areprovided with downwardly directed pattern sensing nibs 132 and 133(FIGS. 7, 8 and 9).

The plurality of sensing levers 105' are raised and lowered in unison bythe vertical reciprocation of push rods 90 and 91 acting on the liftinglever yoke 97 and the coil springs 110 and 111 maintain each lever inits respective position on rod members 103 and 104 and within theirguiding slots provided in each of the three guide members; however, saidsprings will permit a sensing lever to tilt slightly in a forwardly orrearwardly direction for reasons to be more fully explained hereinafter.

The vertical reciprocation of the sensing levers is synchronized withthe rotary movement of the drum members 68 and 69 and just prior to eachdownward movement of said levers the pattern card strip 29 and thesecond master card 78 are advanced by their respective drum members toplace the next row of pattern perforations in alignment with the patternsensing nibs 132 and 133. Where pattern perforations are present, thesensing nibs will pass therethrough and into the longitudinal grooves 79and 80 which align with and underlie said pattern perforations (FIG. 8).Where no perforations are present, the sensing nibs will simply comeinto contact with the outer surface of the card members. Should avariation occur in the cards being compared, one sensing nib or theother of a lever would be caused to pass through an aligned perforationand the other would remain on the outer surface of its respective card(FIG. 9). A condition of this nature would tilt that particular sensinglever either forwardly or rearwardly depending, of course, on which cardmember was lacking a pattern perforation.

This tilting motion sets up a condition which initiates the stopping ofthe complete machine by means of an electrically controlled stop motionwhich will now be described in further detail.

FIGS. and 11 are wiring diagrams of a conventional stop motion circuitshowing by means of the heavier solid lines in FIG. 10 the flow ofcurrent during the actual running of the machine, and FIG. 11 shows thecircuit change by similar lines which shuts the machine off should avariation in the cards being compared be detected.

During the actual running of the machine a source of 110 voltage iscaused to flow through a transformer 134 which reduces it toapproximately 12 volts. The start button 135 which may be of theconventional push or momentary contact type when closed causes theenergizing of a relay 137. The energizing of this relay automaticallymoves the holding contacts 139 and 140 to the righthand position asdepicted in FIG. 10, and the holding contacts 139 being so actuatedpermit the so-called holding current to flow through the resistor 136and thence to relay 137 while 140 controls the energizing of thesolenoid 38 that is utilized in controlling the engaging and disengagingof the clutch 32 by means of lever member 33.

To stop the machine a horizontally disposed rod 141 extends through thebifurcated portion 109 of the sensing levers 105 and extendingtransversely of said levers the ends thereof are electrically insulatedand supported in the side walls of casing 44.

Should a variation be detected in the cards being compared, a sensinglever will be caused to tilt as heretofore described and in so doing oneside or the other of the bifurcated portion 109 of said lever willcontact the rod 141 to complete another electrical circuit as depictedin FIG. 11.

Contact being made between a sensing lever and rod 141 draws the reducedvoltage, leaving an insufficient amount to keep the relay 137 energized.The deenergizing of the relay causes the holding contacts 139 and 140 tomove to the left-hand position as depicted in FIG. 11 thereby breakingthe circuit to the relay, disengages the clutch 32 and permits the flowof current through these contacts of 139 and thence through theremainder of the stopping circuit as depicted by the heavier solid linesin said FIG. 2. This stopping circuit is provided with a telltale light142 which goes on when this circuit is completed through to the groundG.

Additional elements within the electrical circuits of FIGS. 10 and 11include a jog switch 135, a stop switch 135" and a resistor R which isin circuit with the telltale light 142. The start button 135 is a doublecontact type of switch and the contacts thereof are interconnected in astandard manner by means of a dotted line.

The plurality of sensing levers supported by the lifting lever yoke 97may, if desired to exchange pattern cards, be raised out of action by amechanical means which comprises a hand lever 143 that protrudesoutwardly through an L-shaped aperture 144 provided in the outer sidewall of casing 44. Within this casing, hand lever 143 is pivotedattached adjacent its inner end as at 144 to a vertically disposed studmember 145 (FIG. 2). This stud is pivotally assembled in cross member 92intermediate the push rod guide members 93 and 94. The hand lever isprovided adjacent the innermost end thereof with a rearwardly directedpin 146 disposed at a right angle thereto and in general alignment withthe lower end of a depending stud 147 assembled in the lifting leveryoke 97 intermediate the push rods. 90 and 91. Hand lever 143 isnormally in that position depicted by solid lines in FIG. 2 and iscontinually urged toward this position by a pair of coil spring members148 (one only shown) which attach at one end to the upper portion ofstud member 145 and the opposite end to said hand lever as at 149.

When this hand lever is manually moved to that position in FIG. 2depicted by dot-and-dash lines, pin 146 is caused to push against thelower end of the depending stud 147 thus raising the lifting lever yoke97 and the sensing levers supported thereby to an inactive position.This position is maintained by simply moving the hand lever slightlyrearwardly which will place it beneath a notch 150 provided in saidL-shaped aperture 144 (FIG. 3).

In operation, a strip of pattern card material is fed to the punchinghead of a conventional pattern card duplicating machine. The dictates ofa first master pattern card are transmitted to the punching head by aplurality of indicating levers so that the same pattern perforations areformed in the pattern card strip as in said first master card.

This pattern card strip when leaving the punching head is directed tothe verifying mechanism which comprises the invention and is caused topass over a first drum member that is being advanced periodically andsynchronously with a second drum member that is provided with a secondmaster pattern card. A plurality of vertically reciprocating dualsensing levers are disposed above and in close proximity with the firstand second drum members. On each downward stroke the dual sensing leversare adapted to detect the presence or absence of pattern perforationssimultaneously in both the second master pattern card and the strip ofpattern cards being compared. If no perforations are present, thesensing levers will simply come into contact with the outer surface ofsaid cards and if perforations are present, the sensing nibs of thelevers will pass through the cards and into the longitudinal extendinggrooves provided in the drum members which underlie and align with theparallel rows of pattern perforations. In the event of a variation inthe pattern cards being compared, that sensing lever in alignment Withsaid variation will on its downward movement be caused to tilt eitherforwardly or rearwardly depending on which card has the perforation.

The sensing levers, being bifurcated at their upper extrernity andhaving an electrically controlled rod member passing transversely of andWithin the bifurcated portion, may tilt to contact said rod member. Thiscontact completes an electrical circuit and initiates the stopping ofthe complete punching and verifying operation as heretofore described.

While the invention has been described as applied to a conventionalpattern card punching or duplicating machine, it is to 'be understoodthat it is not to be so limited. The verifying mechanism may, forexample, be used entirely alone to check a previously and independentlyformed pattern member against a master pattern. The drive for indexingthe drums periodically may be derived from any suitable source in such acase. The stop motion would be effective to stop the drive in any one ofa number of possible ways.

While one embodiment of the invention has been disclosed, it is to beunderstood that the inventive concept may be carried out in a number ofways. This invention is, therefore, not to be limited to the precisedetails described, but is intended to embrace all variations andmodifications thereof falling within the spirit of the invention and thescope of the claims.

I claim:

1. A means for verifying a perforated pattern card utilized in circularjacquard knitting machines comprising first and second drum members,said first drum member being adapted to support and guide a masterpattern card and said second drum member being adapted to support andguide said first mentioned pattern card, a plurality of rockable dualsensing members disposed above said drum members, first means forvertically reciprocating said sensing members, a second means foradvancing said drum members in timed relation synchronously withreciprocation of said sensing members for simultaneously comparing theperforations in said cards, an electrically controlled stop motioncircuit for effecting the cessation of said verifying means should saidsensing members detect a variation in said pattern cards, saidelectrically controlled stop motion circuit including an electricallyenergized rod member, whereby said sensing members are rocked so thatthey contact said rod member to complete the stop motion circuit in theevent of a variation in said cards.

2. The mechanism according to claim 1 wherein said sensing membersinclude a bifurcated upper end portion through which said electricallyenergized rod member is adapted to extend.

3. The mechanism according to claim 1 wherein said sensing membersinclude first and second nib elements di-sposed in vertical and spacedrelation, said first nib being adapted to enter a perforation in saidfirst mentioned pattern card and said second nib being adapted to entera perforation in said master pattern card.

4. In combination with a pattern card duplicating machine adapted toform parallel rows of punched pattern perforations on a pattern cardaccording to the dictates of a first master pattern card functioning inconjunction with said machine, a pattern card verifier adapted tocompare said pattern perforations with a second master pattern cardcomprising in combination first and second drum members,-said first drummember being adapted to support and guide said second master patterncard and said second drum member being adapted to support and guide thenewly formed perforated card, a plurality of dual sensing membersdisposed above said cards and drum members, means for reciprocating saidsensing members, said means comprising individual spring members forurging said sensing members toward said drum members and cam controlledrod members for raising said sensing members in unison, and a secondmeans for periodically indexing said drum members in timed relation andsynchronously with the reciprocation of said sensing members fordetecting and comparing the perforations in said pattern card and secondmaster card, said second means including a rosette wheel fixedlyattached at one end of each said drums and gear driven cam members forrotating said rosettes in increments timed to the reciprocation of saidsensing members and a further means for stopping said machine shouldsaid sensing members detect a variation in said card being compared,said further means including an electrically energized rod memberextending transversely of and through said sensing members, said membersbeing rockable in the event of a variation in said cards to touch saidrod member and complete a stop motion circuit.

5. A means for verifying a perforated pattern card utilized in circularjacquard knitting machines comprising first and second drum members,said first drum member being adapted to support and guide a masterpattern card and said second drum member being adapted to support andguide said first-mentioned pattern card, a plurality of dual sensinglevers disposed above and spring biased toward said cards and drummembers, cam controlled lifting rods for raising said levers in unison,cam controlled rosette members fixedly attached to one side of each saiddrum members for turning the latter synchronously and advancing saidcards in increments timed to movement of said sensing levers, and anelectrically controlled stop motion for effecting the cessation of saidverifying should said sensing levers detect a variation in said cards,said electrically controlled stop motion including an electricallyenergized rod member extending transversely of and through the saidsensing levers, said sensing levers being rockable in the event of avariation in said cards to touch said rod member to complete the stopmotion circuit.

References Cited by the Examiner UNITED STATES PATENTS 8/1940 Braun23427 6/1962 Lego 73156 X

1. A MEANS FOR VERIFYING A PERFORATED PATTERN CARD UTILIZED IN CIRCULARJACQUARD KNITTING MACHINES COMPRISING FIRST AND SECOND DRUM MEMBERS,SAID FIRST DRUM MEMBER BEING ADATPED TO SUPPORT AND GUIDE A MASTERPATTERN CARD AND SAID SECOND DRUM MEMBER BEING ADAPTED TO SUPPORT ANDGUIDE SAID FIRST MENTIONED PATTERN CARD, A PLURALITY OF ROCKABLE DUALSENSING MEMBERS DISPOSED ABOVE SAID DRUM MEMBERS, FIRST MEANS FORVERTICALLY RECIPROCATING SAID SENSING MEMBERS, A SECOND MEANS FORADVANCING SAID DRUM MEMBERS IN TIMED RELATION SYNCHRONOUSLY WITHRECIPROCATION OF SAID SENSING MEMBERS FOR SIMULTANEOUSLY COMPARING THEPERFORATIONS IN SAID CARDS, AN ELECTRICALLY CONTROLLED STOP MOTIONCIRCUIT FOR EFFECTING THE CESSATION OF SAID VERIFYING MEANS SHOULD SAIDSENSING MEMBERS DETECT A VARIATION IN SAID PATTERN CARD, SAIDELECTRICALLY CONTROLLED STOP MOTION CIRCUIT INCLUDING AN ELECTRICALLYENERGIZED ROD MEMBER, WHEREBY SAID SENSING MEMBERS ARE ROCKED SO THATTHEY CONTACT SAID ROD MEMBER TO COMPLETE THE STOP MOTION CIRCUIT IN THEEVENT OF A VARIATION IN SAID CARDS.